All the 'old' buggies; ST - XR+ - Folding and Bigfoot are discontinued, quality issues with the Chinese factories and all that.

The new buggies that are available now are redesigned, or at least the front fork and downtube connection is.
Buggies available now are the Rally and the Drifter with the only differnce betwen the two - colour.

New models are about twice as heavy as the 'old' ones, that should give a rough idea about the thickness of tubing used.

The only thing rattling a bit now are the footpegs, and my feet kept slipping off on rougher terrain, otherwise they feel stable and more reliable
than the predecessors, and I've put a lot of miles in

Bigfoot version will come later as we are still ironing out some teething issues with the first production runs.
(buggies that were delivered are checked to the max to be sure they're good)